An item made of any fiber material with binder and designed to resist damage by heat, gases, chemicals, or liquids, and providing a seal or insulation against these media. may include a metal reinforcement. Excludes ASBESTOS SHEET, COMPRESSED; ASBESTOS SHEET, WOVEN; ASBESTOS STRIP, COMPRESSED; ASBESTOS STRIP, WOVEN; FELT SHEET; and FIBER SHEET, VULCANIZED.